samer@0: /*
samer@0:  *	MatrixTrace.java	
samer@0:  *
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.maths;
samer@0: import  samer.core.*;
samer@0: import  samer.tools.*;
samer@0: import  java.util.*;
samer@0: 
samer@0: /**
samer@0: 	This viewer outputs all the elements of a row or column
samer@0: 	to a trace (graph of value against time step). All elements
samer@0: 	of the row are column are consecutively output at each time
samer@0: 	step.
samer@0:   */
samer@0: 
samer@0: public class LineTrace extends Trace implements Observer
samer@0: {
samer@0: 	Observable	obs;
samer@0: 	Vec			src;
samer@0: 
samer@0: 	public LineTrace( Observable o, Vec v) { obs=o; src=v; }
samer@0: 
samer@0: 	public void attach() { obs.addObserver(this); }
samer@0: 	public void detach() { obs.deleteObserver(this); super.detach(); }
samer@0: 
samer@0: 	public void update(Observable o, Object s) 
samer@0: 	{
samer@0: 		if (s==Viewable.DISPOSING) {
samer@0: 			Shell.releaseViewer(this);
samer@0: 		} else if (obs==o) {
samer@0: 			Vec.Iterator i=src.iterator();
samer@0: 			while (i.more()) next(i.next());
samer@0: 		}
samer@0: 	}
samer@0: 	protected void next(double x) {} // !! fix this
samer@0: 	protected void realized() { super.realized(); attach(); }
samer@0: }